CN101866081B - Image display system - Google Patents

Abstract

An image display system comprises a display device, wherein the display device comprises an array substrate and a transparent electrode stacking structure arranged on the array substrate. The transparent electrode stack structure includes: a first electrode including a first slit; a second electrode having an outer edge corresponding to the first slit; and a dielectric layer located between the first electrode and the second electrode and electrically isolating the first electrode from the second electrode.

Description

Image display system

technical field

The present invention relates to the technology of flat-panel display devices, and in particular to the technology of display devices of a transverse electric field method.

Background technique

The currently widely used twisted nematic (TN) display device has a limited viewing angle. In order to solve the aforementioned problems, another display method has been proposed, that is, a lateral electric field method in which liquid crystal molecules are driven in a plane substantially parallel to the substrate plane.

It is known that the transverse electric field method is divided into IPS (In Plane Switching; horizontal electric field control) method and FFS (Fringe Field Switch; fringe electric field control) method. The IPS method is configured by combining comb-shaped pixel electrodes and comb-shaped common electrodes. The FFS method is to assign one of the upper electrode layer and the lower electrode layer formed on the same substrate with an insulating layer as a common electrode layer and the other as a pixel electrode layer, and form, for example, in the upper electrode layer A slit or the like serves as an opening through which an electric field passes.

However, the current transverse electric field method still has the problem of uneven and insufficient light transmittance.

Contents of the invention

According to the present invention, an image display system is provided, including a display device, wherein the display device includes: an array substrate; and a transparent electrode stack structure on the array substrate. The transparent electrode stack structure has: a first electrode with a first slit; a second electrode with an outer edge corresponding to the first slit; and a dielectric layer located between the first electrode and the second electrode and electrically sex isolating the first electrode and the second electrode.

Description of drawings

1A and 1B are a cross-sectional view and a top view showing a pixel area of a display device according to a first embodiment of the present invention.

2A and 2B are a cross-sectional view and a top view showing a pixel area of a display device according to a second embodiment of the present invention.

3A and 3B are a cross-sectional view and a top view showing a pixel area of a display device according to a third embodiment of the present invention.

4A-4C respectively show the light transmittance of the pixel regions of the display device according to the first to third embodiments of the present invention.

FIG. 5 is a top view showing a pixel area of a display device according to a fourth embodiment of the present invention.

6 is a top view showing a configuration of a transparent electrode stack structure of a display device according to a fifth embodiment of the present invention.

FIG. 7 is a schematic diagram showing a system for displaying images according to another preferred embodiment of the present invention.

Explanation of reference signs

1, 2, 3, 4～pixel area 10～scanning line

20～semiconductor layer 30～data line

31～branch line 30D～drain electrode

30S～source electrode 51, 52, 53～curve

55～area 100～array substrate

200～opposite substrate 110, 120～transparent electrode

111, 112, 113, 114～slits 115, 155～connecting electrodes

116, 156～secondary electrode 120a, 120b～outer edge

131, 132～dielectric layer 140, 150～transparent electrode

140a, 140b～outer edge 150a, 150b～outer edge

151, 152～slit 151a, 151b, 152a, 152b～outer edge

210～shading layer 211～opening

215～area 300～liquid crystal layer

400～display panel 500～input unit

600～electronic devices 810, 820～transparent electrodes

811, 812, 813, 814～slit 821, 822～slit

Detailed ways

In order to make the above-mentioned and other purposes, features, and advantages of the present invention more clearly understood, the preferred embodiments are specifically listed below, together with the accompanying drawings, and are described in detail as follows:

The descriptions of "(substantially) (mutually) parallel" and "substantially equal" mentioned below mean that the design is expected to be parallel and equal to each other, but it is limited by the actual manufacturing error, but in reality It is difficult to achieve parallelism and equality as defined by mathematics or geometry, but if the error falls within the allowable range of the corresponding manufacturing specification, it is still considered parallel and equal. Those of ordinary skill in the technical field of the invention should understand that the above-mentioned manufacturing specifications vary according to various conditions, so they are not listed one by one.

In the following text and each accompanying drawing, for the same or corresponding elements, the same element symbols are given, and the attributes of each accompanying drawing and the content they represent have been described in the "Description of Reference Signs", and will not be described later. Repeat the instructions again.

Please refer to FIG. 1A and FIG. 1B , which show the pixel area 1 of the display panel 400 according to the first embodiment of the present invention. FIG. 1A is a cross-sectional view drawn along the section line I-I in FIG. 1B . The display device 400 includes an array substrate 100 on which there are scan lines 10 and data lines 30 vertically intersecting through a dielectric material, thereby defining each pixel area. A part of the scanning line 10 is used as a gate of a thin film transistor, and a semiconductor layer 20 is disposed on the gate, and a source electrode 30S and a drain electrode 30D are disposed on the gate and the semiconductor layer 20 to form a thin film transistor. In addition, the drain electrode 30D is electrically connected to the corresponding data line 30 via the branch line 31 .

The transparent electrode stack structure is disposed on the array substrate 100 . The dielectric layer 132 is disposed between the transparent electrode stack structure and the data line 30 . The transparent electrode stack structure has a transparent first electrode 110 and a second electrode 120 , and a dielectric layer 131 between the electrodes 110 and 120 . The dielectric layer 131 is used to electrically isolate the electrodes 110 and 120 . In addition, the first electrode 110 is electrically connected with the source electrode 30S as a pixel electrode (pixel electrode), and has a plurality of slits. In this embodiment, the first electrode 110 has a connecting electrode 115 and five sub-electrodes. Electrode 116, wherein, the five sub-electrodes 116 are connected to each other through the connecting electrode 115, and are separated from each other by four open slits 111, 112, 113, 114; and in other embodiments, the first electrode 110 The number and form of the slits (open or closed), the number and form of the secondary electrodes and connecting electrodes can be determined arbitrarily according to the requirements. The second electrode 120 is located below the first electrode 110 , is coupled to the common voltage source of the display panel 400 as a common electrode, and does not have any opening or slit (that is, it is formed in an all-round way). In addition, in this embodiment, a part of both the first electrode 110 and the second electrode 120 overlaps with the data line 30 .

The display panel 400 further includes an opposite substrate 200 , a liquid crystal layer 300 , and a light shielding layer 210 . The opposite substrate 200 is disposed opposite to the array substrate 100 , there is a space between the two substrates 100 , 200 and the liquid crystal layer 300 is filled therein. The light-shielding layer 210 is placed on the opposite substrate 200, between the two substrates 100, 200, and substantially overlaps with the data line 30, and has at least one opening 211 to expose the pixel area 1, and expose the A partially transparent electrode stack structure in which the data lines 30 overlap. In addition, at least one slit of the first electrode 110 is disposed corresponding to the opening 211 .

The light transmittance of the display panel 400 in FIG. 1A in the pixel region 1 is shown in FIG. 4A . The area 55 in FIG. 4A corresponds to the area affected by the light-shielding effect of the light-shielding layer 210 in FIG. 1A, the scale of the X-axis is the position corresponding to the width range of the pixel area 1 from left to right shown in FIG. 1A, and Y The axis refers to the value of the light transmittance, and the curve 51 shows the light transmittance of each position of the pixel area 1, and the figure also shows that the average light transmittance (Ave T) of the pixel area 1 is 72.83%.

Referring to FIG. 2A and FIG. 2B , it shows the pixel area 2 of the display panel 400 according to the second embodiment of the present invention. FIG. 2A is a cross-sectional view drawn along the section line II-II in FIG. 2B .

The only difference between the first and second embodiments lies in the position of the outer edge of the second electrode. In FIG. 2A and FIG. 2B, the outer edge 140a of the second electrode 140 is correspondingly arranged in the slit 111 of the first electrode 110, and is misaligned with the two edges of the slit 111 (that is, it is not aligned with the edge of the slit 111). two edges overlap), wherein the two edges of the slit 111 are substantially parallel to the extending direction of the data line 30 . Preferably, the outer edge 140a is disposed along the middle position of the slit 111 (that is, the outer edge 140a is correspondingly disposed at the midline position of the slit 111 ). In addition, the outer edge 140 b of the second electrode 140 may also be corresponding to the slit 114 of the first electrode 110 . Preferably, the outer edge 140b is disposed along the middle of the slit 114 . That is, the outer edges 140 a, 140 b of the second electrode 140 in the second embodiment are correspondingly disposed in the slits 111 , 114 of the first electrode 110 . In other embodiments, one of the outer edges 140 a , 140 b of the second electrode 140 may extend to a corresponding position corresponding to the outer edges 120 a , 120 b of the second electrode 120 shown in FIG. 1B . In addition, in this embodiment, the outer edges 140a, 140b of the second electrode 140 are substantially parallel to the extending direction of the data line 30 .

The light transmittance of the display panel 400 in the pixel area 2 is shown in FIG. 4B , and the light transmittance at each position of the pixel area 2 is shown by a curve 52 . Compared with the curve 51 of FIG. 4A, the valley value of the curve 52 near the position corresponding to the outer edge 140a, 140b of the second electrode 140 in FIG. (such as the place circled by the dotted line in the curve 52). Thus, the variation degree of the light transmittance of the pixel area 2 can be reduced, and the average light transmittance of the pixel area 2 can be increased. For example, FIG. 4B shows that the average light transmittance of the pixel region 2 is 75.83%, which is greater than 72.83% of the pixel region 1 .

Please refer to FIG. 3A and FIG. 3B , which show the pixel region 3 of the display panel 400 according to the third embodiment of the present invention. FIG. 3A is a cross-sectional view drawn along the section line III-III in FIG. 3B . The difference between the second and third embodiments is only that the second electrode 150 in the pixel region 3 has a plurality of slits. In this embodiment, the second electrode 150 has one connection electrode 155 and three sub-electrodes 156, three Each sub-electrode 156 is connected to each other by connecting electrode 155, and is separated from each other by two open slits 151, 152; or closed), the number and form of secondary electrodes and connecting electrodes can be determined arbitrarily according to requirements. In addition, in this embodiment, compared with the second electrode 140 shown in FIGS. 2A and 2B , the additional “edges” generated by forming a plurality of slits between the sub-electrodes 156 of the second electrode 150 are regarded as the second electrode. One of the outer edges included by the electrode 150 .

As shown in FIG. 3B, the slits 151, 152 of the second electrode 150 correspond to the slits 112, 113 of the first electrode 110 respectively, wherein the outer edges 151b, 151b, 152b are correspondingly disposed in the slits 112 and 113 respectively. Preferably, the outer edges 151b, 152a are arranged along the midlines of the slits 112, 113, respectively. In this embodiment, the widths of the slits 151, 152 are substantially equal to the widths of the slits 111-114; in another embodiment, the widths of the slits 151, 152 may be greater than the widths of the slits 111-114, for example The width of the slits 151, 152 can be one (not included) to two times the width of the slits 111-114, or larger than the width of the slits 111-114 in value, for example, the width of the slits 111-114 is 3 μm , while the width of the slits 151, 152 is greater than 3 μm.

In addition, in this embodiment, taking the slit 111 of the first electrode 110 as an example, among the edges of the second electrode 150, the orthographic projection position of only one outer edge 150a falls in the slit 111; Taking the slit 112 of 110 as an example, among the slits of the second electrode 150 , the orthographic projection position of only one outer edge 151 b of one slit 151 falls in the slit 112 .

The light transmittance of the display panel 400 in the pixel region 3 is shown in FIG. 4C . Compared with curve 51 and curve 52, the valley bottom value of curve 53 near the position corresponding to the outer edge 150a, 151b, 152b, 150b of the second electrode 150 in FIG. There is a significant increase in the value (such as the place circled by the dotted line in the curve 53). Thus, the variation degree of the light transmittance of the pixel area 3 can be further reduced, and the average light transmittance of the pixel area 3 can be further increased. For example, in FIG. 4C , the average light transmittance of the pixel area 3 is 77.07%, which is higher than the average light transmittance of the pixel area 1 and the pixel area 2 respectively.

Compared with the third embodiment, in the fourth embodiment shown in FIG. 5 , the range of the first electrode 110 and the second electrode 150 shrinks from the position overlapping the data line 30 in the third embodiment to the pixel area. 4 without overlapping with the data line 30, and the outer edges 151a, 151b of the second electrode 150 in the longitudinal direction corresponding to the slit 151 are two slits 111, 112 respectively corresponding to the first electrode 110, corresponding to the slit The outer edges 152a, 152b of the second electrode 150 in the longitudinal direction of the pair of slits 152 correspond to the two slits 114, 113 of the first electrode 110 respectively, and the corresponding ways are the same as the outer edges 140a and 152b shown in FIG. 2A. The corresponding manner of the slit 111 is the same or similar. In addition, in this embodiment, the outer edge 150a (or 150b) of the second electrode 150 corresponds to a sub-electrode 116 of the first electrode 110, that is, the orthographic projection position of the outer edge 150a (or 150b) falls in a sub-electrode 116 .

In the fifth embodiment according to the present invention, the first electrode 110 shown in FIG. 3B or FIG. A transparent electrode 820 with closed slits 821 , 822 replaces the second electrode 150 shown in FIG. 3B or FIG. 5 . The position correspondence between the transparent electrodes 810 and 820 is the same as the position correspondence between the electrodes 110 and 150 shown in FIG. 3B or FIG. 5 . Wherein, the slits 811, 812 are parallel to each other, the slits 813, 814 are parallel to each other, and the slits 812, 813 are not parallel to each other, so that the pixel area using the transparent electrodes 810, 820 is a dual domain. Similarly, the slits 811 , 812 , 813 , and 814 may also be parallel to each other so that the pixel regions using the transparent electrodes 810 and 820 are monodomain. In addition, the shape of the transparent electrode 820 can also be adjusted so that it corresponds to the edges of the slits 811 and 814 respectively and is substantially parallel to the slits 811 and 814 .

As shown in FIG. 7 , the display panel 400 can be assembled with the input unit 500 to manufacture various electronic devices 600 . The display panel 400 may only have one of the aforementioned pixel areas 1 , 2 , 3 , 4 or mix the aforementioned pixel areas 1 , 2 , 3 , 4 in any form. The input unit 500 is coupled to the display panel 400 to input a signal (such as an image signal) into the display panel 400 to generate an image. The electronic device 600 may be a mobile phone, a digital camera, a personal digital assistant, a notebook computer, a desktop computer, a television, a car monitor, or a portable digital video disc player.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art to which the present invention belongs may make some changes and modifications without departing from the spirit and scope of the present invention. Modification, therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (9)

1. An image display system, comprising a display device: The display unit contains: an array substrate; and The transparent electrode stack structure is arranged on the array substrate, and the transparent electrode stack structure includes: The first electrode has a plurality of first electrodes separated by a plurality of first slits; a second electrode having a plurality of second electrodes each having a plurality of outer edges; and a dielectric layer located between the first electrode and the second electrode and electrically isolating the first electrode and the second electrode, Wherein, the plurality of outer edges of one of the adjacent two second sub-electrodes and an outer edge of the other second sub-electrode are respectively located in the different plurality of first slits of the first electrode, and the The other outer edge of the other second electrode overlaps with the first electrode. 2. The image display system as claimed in claim 1, wherein at least one of the plurality of outer edges of one of the adjacent two second sub-electrodes is correspondingly disposed on one of the plurality of first slits midline position. 3. The image display system as claimed in claim 1, Wherein the plurality of first electrodes are connected to each other by the first connection electrodes. 4. The image display system as claimed in claim 1, Wherein the plurality of second sub-electrodes are connected to each other by the second connecting electrodes and separated by the plurality of second slits respectively. 5. The image display system as claimed in claim 4, wherein the plurality of first slits correspond to the plurality of second slits. 6. The image display system as claimed in claim 1, wherein the second electrode is located below the first electrode. 7. The image display system as claimed in claim 1, further comprising: The opposite substrate is arranged on the array substrate and faces the transparent electrode stack structure; The liquid crystal layer is arranged between the array substrate and the opposite substrate. 8. The image display system as claimed in claim 1, further comprising an electronic device, the electronic device comprising: the display device; and The input unit is coupled to the display device, and provides signal input to the display device, so that the display device displays images. 9. The image display system as claimed in claim 8, wherein the electronic device is a mobile phone, a digital camera, a personal digital assistant, a notebook computer, a desktop computer, a television, a car monitor, or a portable digital video disc player device.